| | Report (issue) | and Tertiary Age of the Northern Black Hills, South Dakota by Lewis H. Shapiro I APR 2 3 1970 DENVER...Geological Engineering South Dakota School of Mines and Technology Rapid City, South Dakota Submitted in accordance...AND IN ALL EARLIER LITERATURE ON THE RUBY BASIN DISTRICT. COLOR KEY FOR ALL MAPS IN THIS REPORT Rock....... 45 Mining Districts ....................... 49 4.1 Bald Mountain Mining District ............Bald Mountain District ....... 49 4.13. Geology of the Bald Mountain Mining District ... 51 ... | | | Report (volume) | National Forest, South Dakota and Wyoming U.S. GEOLOGICAL SURVEY BULLETIN 1580 SOUTH DAKOTA WYOMING I -«*&...Geology of the Black Hills National Forest, South Dakota and Wyoming We st from. Washington SHOWING...Geology of the Black Hills National Forest, South Dakota and Wyoming By ED DEWITT, J. A. REDDEN, ANNA...Mineral resources locatable commodities 50 History of mining and exploration 50 Metals 51 Industrial minerals...potential of the Black Hills National Forest, South Dakota and Wyoming, was made to assist the U.S. Forest |
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